diff --git a/src/option.c b/src/option.c
index 7e1f5d1..f9d2734 100644
--- a/src/option.c
+++ b/src/option.c
@@ -6403,7 +6403,7 @@
 #if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
     else if (varp == &p_imak)
     {
-	if (gui.in_use && !im_xim_isvalid_imactivate())
+	if (!im_xim_isvalid_imactivate())
 	    errmsg = e_invarg;
     }
 #endif
diff --git a/src/testdir/gen_opt_test.vim b/src/testdir/gen_opt_test.vim
index b69ae67..019c757 100644
--- a/src/testdir/gen_opt_test.vim
+++ b/src/testdir/gen_opt_test.vim
@@ -96,6 +96,7 @@
       \ 'guifontwide': [['', 'fixedsys'], []],
       \ 'helplang': [['', 'de', 'de,it'], ['xxx']],
       \ 'highlight': [['', 'e:Error'], ['xxx']],
+      \ 'imactivatekey': [['', 'S-space'], ['xxx']],
       \ 'isfname': [['', '@', '@,48-52'], ['xxx', '@48']],
       \ 'isident': [['', '@', '@,48-52'], ['xxx', '@48']],
       \ 'iskeyword': [['', '@', '@,48-52'], ['xxx', '@48']],
diff --git a/src/version.c b/src/version.c
index 1a6881f..47dd973 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    585,
+/**/
     584,
 /**/
     583,